Returning to the Thirteenth Corps, who were on the left of the Fourth Army at the battle of the Selle River on October 17, the weary Twenty-fifth Division had been drawn into reserve, while the Fiftieth, their heavy losses made good by reinforcements, were put into the right of the line once more, while the Sixty-sixth carried on to the left. The river was at once reconnoitred and found to be a serious impediment, especially in the immediate neighbourhood of Le Cateau, where it had been dammed and deepened, while it was commanded by high ground in the east and also by numerous strongly-built houses in the town. Arrangements were made, therefore, that the main attack should be lower down where the facilities were greater. The Fiftieth Division held this right sector, with St. Souplet as {188} its southern limit for the 151st Brigade, while the 149th was near St. Benin. The Sixty-sixth covered the ground up to Le Cateau, the South African Brigade under General Tanner being north of the town. The South Africans with great skill and daring arranged their assembly within fifty yards of the German outposts on the other side of the stream, at a point where they were absolutely commanded by the German guns in case of discovery. There they lay in silence until, at the first twinkle of dawn, they sprang to their feet and rushed forward to the eight bridges which the sappers with their usual splendid efficiency had prepared for them during the night. So well had the bridge-makers worked, that in the region of the main attack they had actually been able to throw across bridges which would carry forward the ten tanks allotted for the assault.